Molding-machine.



E. F. THIEMANN.

MOLDING MACHINE.

APPLICATION FILED AUG. 28, 1911.

' Patented Jan. 13, 1914.

3 SHEETS-SHEET 1.

W/T/VESJEJ //VI /V 7 0!? 39' E. P. THIEMANN.

MOLDING MACHINE.

APPLIOATION FILED AUG. 28, 1911.

1,084,048, Patented Jan. 13, 1914.

-3 SHEETSr-SHBET 2.

COLUMBIA PLAHOGRAPH CO.,\\'ASHINGTON, n. c,

E. F. THIEMANN.

MOLDING MACHINE.

APPLICATION FILED AUG. 28, 1911.

Patented Jan. 13, 1914.

3 SHEETS-SHEET 3.

H mm W,

VIE

GEL

COLUMBIA PLANDORAPII Co.,\vAsH|NGTON, D. C.

ERNEST F. THIEMANN, OF MILWAUKEE, WISCONSIN.

MOLDING-MACHINE.

Specification of Letters Patent.

Patented Jan. 13, 1914.

To all whom it may concern:

Be it known that I, ERNEST F. THIEMANN, a citizen of the United States,and resident of lV Lilwaukce, in the county of Milwaukee and State ofWisconsin, have invented new and useful Improvements inMolding-Machines, of which the following is a description, referencebeing had to the accompanyingdrawings, which area part 01 thisspecification.

This invention has for its object to provide mechanism for automaticallypreparing molding flasks by filling them with sand around ,a pattern,supplying them with movable bottoms, compressing the sand against thepattern by means of said bottoms, and stripping or drawing the patternsfrom the sand- Another object of this invention is to ac-; complish ,theabove in a continuously operating mechanism.

With the above and other objects in view the invention consists in themolding machine, as herein claimed, and all equivalents.

Referring to the accompanying drawings in which llke characters ofreference ,indicate the same parts ,in the different views: Figure l is.a iront elevation of a molding machine constructed in accordance withthis invention; Fig. 2 is a sectional detail view .of a portion thereof,showin thesand hopper and the hopper for furnishing the flask bottoms; Fig. 3 is a sectional detail view on the plane of line 33 of F 2; Fig. {1is asectional plan view of the sand hopper; 5 is a perspective view ofone of the ymovable flask bottoms; Fig. .6 is a sectional detail viewofa portion or a molding machine .of a modified construetion,l

wherein ,the patterns are provided with special mechanism for drawingthem from the sand-5 Fig. 7 is a transverse sectional View of a portionthereof; and .Fig. 8 is a sectional view showing ,the enga ement of thelowermost bottom ,plate witi lugs at the ;lower end of the hopper.

aIn these drawings 10 indicates a drum or wheel which is journaled instandards 11 and is suitably driven in the direction vof the arrow ofFig. 1. Thedrum has pattern plates 12 secured to its periphery,preterably by having them bolted thereto, ,as shown in Fig. 2. Sectionsofimolding flasks 13 are adapted ;to be attached to the pattern plates12 by means of lugs Leon alternate pattern plates engaging openings in lside ears of the flask sections and by means of openings in ears of theintermediate Jiltterii plates engaged by lugs 15 of the 'iask scctlonsthereof. Thus provision is made for the cope and drag sections of eachflask being accommodated on the drum, adjacent to each other. The flasksections, by their flaring shape, have their edges close to gether whenthey are mounted on the drum so that the sand from the sand hopper will,not fall between them. v

The sand hopper 16, in the form of a short glfunnel, is pivotallymounted at 17 to a staiionary spout 18, in which there is a constantslpply of molding sand in condition for filling the flask sections. Thishopper 1i) swings on its pivoted connection 17 so as to ride on ,theedges of the flask sect-ions as ;they pass beneath it, and is desirablygiven :1 spring pressure to cause it to scrape the sand evenly acrosstheopenings of the flask sections by means of a coil spring 19 fittingin spring seatsvon the hopper and the spout respectively. The spoutextends into the hopper a suflicient extent to prevent the sandioverflowing the hopper, and a guard 20 pivotally mounted at thescraping edge of the ,hopperand extending around the opposite edge ofthe hopper rides on the flask sections and prevents the sandescaping atsuch opposite edge ,of the hopper which is spaced from the flasksections. As each flask section travels beneath the sand hopper 16 itisfilled with sand around the pattern-on the pattern plate 12 and thesand is smoothlyscraped across the open end of the flask sect-ion by theedge of the hopper which is beveled for that purpose. A tubular hopper21,, fixed in position above the drum 10, is nextencountered by theflask sections, and in this hopper is contained a number-of bottomplates 22 to be fed singly to the flask sections when they are in properposition to receiveihem. The column of bottom plates 2 is supportedwithin the hopper 21 by the lowermost bottom plate engaging a pair ofinwardly extending lugs 23011 the lower end of the hopper while itsoppositeedge engages a spring retracted pivoted catch 2 1 workingthrough an opening in the lower end of the hopper. The lowermost bottomplate is released and dropped onto a flask section, when the latter isin position to receive it,,by thepivoted catch 24 beingswung outwardlyagainst the action of its spring, and this movement is accomplished by Plever 25, fulcrumed on the side of the hopper 21, becoming engaged by aprojecting pin 26 on the side of the flask section and causing the catchtoswing with it, because of said catch having an extension 27- bearingagainst the lever, as shown in Figs. 1 and 3. Each of the bottom plates22 has a metal lug 28 secured to it at its rear edge and the plate isrecessed above the lug to receive the lug of the bottom plate above itwhen they are in column format-ion in the hopper. This downwardlyextending lug 28 falls into the sand of a flask section when the bottomplate beneath is carried out by the preceding flask section, and bycoming in engagement with the rear wall of the flask section it iscarried along with the drum in position to cover the sand of the flasksection.

On leaving the hopper the bottom plate 22 immediately comes into bearingwith a stationary cam 29 having a presser face eccentric to the drum andis carried along the surface thereof by the turning motion of the drum.By reason of said presser face being eccentric to the drum the bottomplate is forced inwardly to compress the sand around the pattern. henthe flask section reaches the lower part of the drum it is inverted andrests upon the cam 29, which recedes from the drum and thus permits theflask section to become disconnected from the drum, the patterns beingdrawn therefrom. When the flask sections are disengaged from the drumthey pass onto a conveyer belt 30, which carries them away from themachine. By this means the empty flask sections are fed to the drum andplaced in position thereon in any desirable manner, and in travelingwith the drum they are filled with sand, then receive a bottom plate,and then have the sand compressed around the pattern by said bottomplate acting upon the stationary cam and finally have the patternwithdrawn and become disconnected from the drum and deposited on thedischarge conveyer ready to be set up.

It is obvious that the invention is not con fined to the particulardetails of construction which have been described, but variousmodifications may be made therein without departing from the spirit andscope of the invention. An example of such departure is shown in Figs. 6and 7, wherein provision is made for drawing the pattern from the sandindependent of the separation of the flask section from the drum. Inthis construction the drum is provided with recesses 31 into whichpatterns 32 may travel 1 through stripping plates 33, the latter be ingsecured to the drum 10 in place of the pattern plates 12 of the otherconstruction. Each of the patterns is carried on a rod 34 which slidablypasses through a bearing provided for it in the drum and has its endconnected by means of a link 35 with a crank arm 36 on a shaft 37, whichis journaled at the end of a frame 38 containing a guide bearing 39 forthe rod 34. The end of shaft 37 has a pair of trip arms 40, which, inthe travel of the drum, are adapted to engage pins 41 and 42, the formerserving to cause the shaft to turn in the direction to draw the pattern32 through the stripping plate 33 into the recess 31, and the latterserving to return the pattern to its normal position. The pins 41 and 42are desirably mounted on arms 43 projecting from one of the standards11. The operation of this construction is the same as the other, exceptthat the pattern is quickly withdrawn from the sand with a straight linemovement instead of being gradually tilted away from the sand as whenthe separation of the flask sections from the drum is relied upon.

lVhat I claim as new and desire to secure by Letters Patent, is:

1. A molding machine, comprising a rotary member, patterns carriedthereby, flask sections attached to the rotary member, a sand hopper inthe path of the flask sections for filling them with sand, means forcompressing the sand within the flask sections, and a bearing surfacediverging from the rotary member upon which the flask sections aredelivered by the rotary member.

2. A molding machine, comprising a rotary drum, patterns carriedthereby, flask sections attached to the rotary drum, a sand hopper inthe path of the flask sections for filling them with sand, means fordelivering bottom plates to the flask sections, and a cam engaged by thebottom plates for forcing them against the sand to compress the sandaround the patterns, said cam receding from the rotary drum to permit ofthe flask sections traveling out of connection with the drum.

3. A. molding machine, comprising a drum, flask sections attached to thedrum, a sand spout, asand hopper pivotally connected with the sandspout, a spring bearing on the sand hopper for holding it in contactwith the flask sections in their travel with the drum, and a guardpivotally mounted on the hopper and riding on the flask sections toconfine the sand during the movements of the hopper.

A molding machine, comprising a rotary drum, patterns thereon, flasksections attached to the drum, means for filling the flask sections withsand, a hopper, bottom plates contained within the hopper, lugs on thebottom plates to engage the edges of the flask sections, means forreleasing the bottom plates from the hopper, and means for forcing thebottom plates within the flask sections to compress the sand around thepatterns.

5. A molding machine, comprising a rotary drum, patterns carriedthereby, flask sections attached to the drum, means for filling theflask sections with sand, a hopper, bot-tom plates contained Within thehopper, lugs at one side of the bottom of the hopper engaging thelowermost bottom plate, a Spl'll'lg catch at the other side of thebottom of the hopper also engaging the lowermost bottom plate, a leveron the hopper engaging the catch, aproj ection on each flask section forengaging the lever and causing it to release the catch and permit abottom plate to fall on the sand of a flask section, and means forforcing the bottom plates into the flask sections to compress the sandaround the patterns.

6. A molding machine, comprising a rotary drum, rods slidable thereon,patterns carried by the rods, stripping plates through which thepatterns project, crank arms carried by the drum and connected With therods, and means in the path of the crank arms for causing the crank armsto turn and thereby move the patterns through the strip ping plates,flask sections attached to the drum, means for filling the flasksections with sand, and means for compressing the sand around thepatterns.

In testimony whereof, I aflix my signature, in presence of twoWitnesses.

ERNEST F. THIEMANN. Witnesses R. S. C. CALDWELL, CLARA V, MUEHLBAOH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Baton, Washington, D. C.

